Got a 727 job lined up
A somewhat short sighted view.
(a) the exercise involves interpretation and manipulation of data. The origin of the particular data set is irrelevant .. it is the technique and strategies which are important. The first aim should be to learn the topic.
(b) the second aim should be to pass the exam. Practice, practice, and past papers is the trick here.
He who omits the first short changes himself. He who omits the second gets to come back for another go.